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How to upload the images with zoom functionality

First, we need to login to the SAP Cloud Platform. After login, We have to create a new  project in SAP Web IDE.

Here we are creating a project with a project name “UploadImages” as shown below.

images.json

Now lets create an empty JSON structure as shown below.

{

	"Images": [

	]

}

Later we can use this model to store the file content of uploaded images, so that we can bind those images to the view.

view1.view.XML

<mvc:View controllerName="com.UploadImages.controller.View1" xmlns:core="sap.ui.core" xmlns:f="sap.ui.layout.form"
	xmlns:html="http://www.w3.org/1999/xhtml" xmlns:l="sap.ui.layout" xmlns:mvc="sap.ui.core.mvc" xmlns:u="sap.ui.unified" xmlns="sap.m">
	<Shell id="shell">
		<App id="app">
			<pages>
				<Page id="page" title="Upload Images">
					<content>
						<u:FileUploader change="onUploadPress"  id="fileUploader"
							name="ImagesUpload" buttonOnly="true" buttonText="Browse"/>
						<l:Grid class="sapUiMediumMarginTop" content="{imagesModel>/Images}" defaultSpan="L3 M4 S12" id="imageGrid" vSpacing="0.5">
							<VBox height="">
								<layoutData>
									<l:GridData span="L3 M6 S12"/>
								</layoutData>
								<Image class="imgclass" height="135px" id="gridImagesId" press="onImageZoom" src="{imagesModel>Pic}" width="95%"></Image>
								<core:HTML
									content='<div id="myModal" class="modal"> <span class="close">X</span><img class="modal-content" id="img01"/><div id="caption"></div></div>'></core:HTML>
							</VBox>
						</l:Grid>
					</content>
				</Page>
			</pages>
		</App>
	</Shell>
</mvc:View>

View1.controller.js : 

sap.ui.define([
	"sap/ui/core/mvc/Controller",
	"sap/ui/model/json/JSONModel"
], function (Controller,JSONModel) {
	"use strict";

	return Controller.extend("com.UploadImages.controller.View1", {
		onInit: function () {
                       
                       /* load images json structure using jQuery modulepath */
			var oModel = new JSONModel(jQuery.sap.getModulePath("com.UploadImages", "/model/images.json"));
			this.getView().setModel(oModel, "imagesModel");
		}
	});
});

Image Upload:

The below function will be triggered whenever user clicks on “Browse” button.

onUploadPress: function(oEvent) {

			var oModel = this.getView().getModel("imagesModel");
			var oData = oModel.getData();
				var f = oEvent.oSource.oFileUpload.files[0];
				var Path = URL.createObjectURL(f); 
				var obj = {
					"Name": f.name,
					"Pic": Path
				};
				oData.Images.push(obj);
				oModel.setData(oData);
			
		}

Once the file has been uploaded, we are updating images.json structure with the corresponding image name and its source path.

ZOOM Functionality:

This function will trigger whenever user clicks on anyone of the uploaded image.

	onImageZoom: function(oEventArgs) {

			var ImagePath = oEventArgs.getSource();
			var sourecepath = ImagePath.getSrc();
			var modal = document.getElementById("myModal");  // pass model id
			var modalImg = document.getElementById("img01");  //pass image id
			modal.style.display = "block";
			modalImg.src = sourecepath;
			modalImg.height = 500;
			modalImg.width = 100;
			var span = document.getElementsByClassName("close")[0];
			span.onclick = function() {
				modal.style.display = "none";
			};

		}

We can control the modal resolution by its height and width.

CSS

The below CSS is used for zooming in the image,

.sapUiMediumMarginTop.bgColour{
	 background-color: rgb(66, 179, 244) !important;
}
.buttonClass{
margin-left:330px !important;	
}
.imgclass {
  border-radius: 5px;
  cursor: pointer;
  transition: 0.3s;
  border: 2.5px solid black;
}

.imgclass:hover {opacity: 0.7;}

/* The Modal (background) */
.modal {
  display: none; /* Hidden by default */
  position: fixed; /* Stay in place */
  z-index: 1; /* Sit on top */
  padding-top: 100px; /* Location of the box */
  left: 0;
  top: 0;
  width: 100%; /* Full width */
  height: 100%; /* Full height */
  overflow: auto; /* Enable scroll if needed */
  background-color: rgb(0,0,0); /* Fallback color */
  background-color: rgba(0,0,0,0.9); /* Black w/ opacity */
}

/* Modal Content (image) */
.modal-content {
  margin: auto;
  display: block;
  width: 95%; 
}

/* Add Animation */
.modal-content, #caption {  
  -webkit-animation-name: zoom;
  -webkit-animation-duration: 0.6s;
  animation-name: zoom;
  animation-duration: 0.6s;
}

@-webkit-keyframes zoom {
  from {-webkit-transform:scale(0)} 
  to {-webkit-transform:scale(1)}
}

@keyframes zoom {
  from {transform:scale(0)} 
  to {transform:scale(1)}
}

/* The Close Button */
.close {
  position: absolute;
  top: 15px;
  right: 35px;
  color: #FF0000;
  font-size: 40px;
  font-weight: bold;
  transition: 0.3s;
}

.close:hover,
.close:focus {
  color: #bbb;
  text-decoration: none;
  cursor: pointer;
}

/* 100% Image Width on Smaller Screens */
@media only screen and (max-width: 700px){
  .modal-content {
    width: 100%;
  }
}

The output as follows:

Now we can see the all uploaded images in a gallery mode. This is how it looks like after uploading the images as shown below

In the above gallery we have 3 images. suppose lets say we want see the second image with zoom effects whenever user clicks on it.

This is how we gonna display.

@image source : Rebekka D NickyPe

Conclusion:  By following the above approach we have successfully uploaded the images and we are able to show that particular image with zoom effects.

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